from datetime import datetime, date, time, timezone

print("现在的datetime是：",datetime.now() )

print("现在的datetime+UCT是：",datetime.now(timezone.utc))


a= datetime.now() 
print("现在的timestamp是：",a.timestamp())


b= a.timestamp()
print("现在的fromtimestamp是：",datetime.fromtimestamp(b))


